Patent Grant
7857151
1. Field of the Invention
The present invention relates to tension rods for supporting curtains, such as shower curtains, and more particularly, to a tension rod assembly including an adaptor that permits the use of equal size finials at the ends of the tension rod.
2. Description of Prior Art Including Information Disclosed Under 37 CFR 1.97 and 1.98
Tension rods for use in supporting shower curtains and/or shower curtain liners between the opposing walls in a bath or shower enclosure are well known in the art. The effective length of such tension rods is altered by fabricating the rod to include first and second substantially cylindrical rod sections. The second rod section is made hollow and has an inner diameter larger than the outer diameter of the first rod section. Accordingly, the first rod section can be telescopically received within the second rod section to a depth that causes the tension rod to have the desired effective length to press the ends of the rod against the opposing walls to suspend the rod. One rod is then rotated relative to the other so as to lock the rod sections in that relative position.
Often the walls of the tub or shower enclosure are made of material with a smooth surface and may even be tile with a very smooth surface. Usually, the ends of the tension rod are each provided with an end member that includes a pressure surface, such as a rubber tip, adapted to bear against the wall. The pressure surface substantially increases the friction between the rod end and the wall to reduce the amount of force that must be applied to the wall surface to prevent the rod end from moving relative to the wall because of the weight of the shower curtain and/or shower curtain liner suspended from the rod. The end member also serves to prevent damage to the wall because it is resilient and therefore can deform to a certain extent as it is pressed against the wall surface.
The end members are usually hollow and cylindrical. Each has a recess into which the end of one of the rod sections is adapted to be received. The end members are mounted on the rod ends by fitting them over the ends of the respective rod sections.
It is preferable that the end members take the form of specially constructed decorative finials that hide the pressure surface and, at the same time, substantially enhance the aesthetic appearance of the tension rod. When finials are employed as end members, the tension rod appears very similar to a non-tension curtain support rod designed to be hung on a wall by brackets or the like which are fastened permanently to the wall by screws.
The aesthetics of the situation require that the end members have the identical external appearance and hence be of the same size. However, as noted above, the rod sections must have different outer diameters such that one can be received within the other to adjust the effective length of the tension rod. This creates a problem for the manufacturer of the tension rod.
In order for the end members to have the identical external appearance and at the same time fit on rod sections that have different outer diameters, it is necessary to fabricate and employ end members for the tension rod that have different size recesses. That substantially increases the fabrication and assembly costs associated with the tension rod.
It is, therefore, a prime object of the present invention to provide a tension rod assembly that utilizes identical end members.
It is another object of the present invention to provide a tension rod assembly that can be fabricated and assembled at reduced cost.
It is another object of the present invention to provide a tension rod assembly that utilizes an adaptor to compensate for the different outer diameters of the tension rod sections such that identical end members can be employed.
It is another object of the present invention to provide a tension rod assembly that utilizes adapters with different sizes at each end of the tension rod to compensate for the different outer diameters of the tension rod sections such that identical end members can be employed.
In accordance with one aspect of the present invention, a tension rod assembly is provided. The assembly includes first and second substantially cylindrical rod sections. The first rod section has an end and an outer diameter. The second rod section is hollow and has an inner diameter larger than the outer diameter of the first rod section such that the first rod section may be telescopically received within the second section. The second rod section has an end and an outer diameter. The outer diameter of the second rod section is larger than the outer diameter of the first rod section. First and second end members are provided. Each of the first and second end members has a cylindrical recess with substantially the same inner diameter. The first end member is adapted to be received on the end of the first rod section. The second end member is adapted to be received on the end of the second rod section. An adapter is interposed between the end of the first rod section and the first end member.
The adapter constitutes a means for compensating for the difference in the outer diameters of the first and second rod sections.
The adapter has a generally cylindrical shape. It has a recess with an effective inner diameter substantially equal to the outer diameter of the end of the first rod section. It has an outer diameter substantially equal to said inner diameter of the recess of each of the end members.
The adapter has a recess defined by a wall with at least one internal protrusion. The protrusion is elongated. The protrusion extends axially.
The protrusion compensates for the difference in the outer diameters of said first and second rod sections.
The first end member preferably takes the form of a finial.
The assembly also has a second adapter. The second adapter has a substantially cylindrical shape. It has a recess with an effective inner diameter substantially equal to the outer diameter of second rod section. It has an outer diameter substantially equal to the inner diameter of the recess of each of the end members.
The second end member preferably takes the form of a finial.
In accordance with another aspect of the present invention, a tension rod assembly is provided. The assembly includes first and second substantially cylindrical rod sections. The first rod section has an end and an outer diameter. The second rod section is hollow and has an inner diameter larger than the outer diameter of the first rod section such that the first rod section may be telescopically received within the second section. The second rod section has an end and an outer diameter. The outer diameter of the second rod section is larger than the outer diameter of the first rod section. First and second end members are provided. Each of the first and second end members has a cylindrical recess with substantially the same inner diameter. The first end member is adapted to be received on the end of the first rod section. The second end member is adapted to be received on the end of the second rod section. A first adapter is interposed between the end of the first rod section and the first end member. A second adapter is interposed between the end of the second rod section and the second end member.
The first adapter constitutes means for compensating for the difference in the outer diameters of the first and said second rod sections.
Each of the first and second adapters has a recess with an effective inner diameter. The effective inner diameter of the first adapter is smaller that the effective inner diameter of the second adapter. The first adapter constitutes means for compensating for the difference in the outer diameters of the first and second rod sections.
The first adapter has a generally cylindrical shape. The second adapter also has a generally cylindrical shape.
The first adapter has a recess with an effective inner diameter substantially equal to the outer diameter of the first rod section. The second adapter has a recess with an effective inner diameter substantially equal to the outer diameter of the second rod section.
The first and second adapters each have an outer diameter substantially equal to the inner diameter of the recess of each of the end members.
The first adapter has a recess defined by a wall with at least one internal protrusion. The protrusion is elongated. The protrusion extends axially. The protrusion compensates for the difference in the outer diameters of the first and second rod sections.
The first end member preferably takes the form of a finial. The second end member also preferably takes the form of a finial.
To these and to such other objects that may hereinafter appears, the present invention relates to a tension rod assembly with adapter as described in detail in the following specification and recited in the annexed claims, taken together with the accompanying drawings, in which like numerals refer to like parts and in which:
a is an elevation view taken along line 3a-3a of
a is an elevation view taken along line 4a-4a of
As seen in
Tension rod A includes first and second substantially cylindrical rod sections 14, 16. The first rod section 14 has an end 18 and an outer diameter. The second rod section 16 is hollow and has an inner diameter larger than the outer diameter of the first rod section 14 such that the first rod section 14 may be telescopically received within the second section 16. When the rod sections are moved relative to each other such that the rod A has the desired effective length, one rod section is rotated relative to the other to lock the sections in that position.
As seen in
First and second end members 22a, 22b are provided for mounting on rod ends 18, 20 respectively. The end members are identical. Each of the first and second end members 22a, 22b preferably takes the form of a finial with a generally conical decorative exterior enclosing a pressure pad 24. The pressure pad designed to bear against the enclosure wall 10, 12 to which it is mounted. Each pressure pad 24 preferably has a high friction, resilient surface so as to engage the wall without causing any damage. Each end member has a cylindrical recess 26 with substantially the same inner diameter.
The first end member 22a is adapted to be received on the end 18 of the first rod section 14. The second end member 22b is adapted to be received on the end 20 of the second rod section 16.
An adapter 28 is interposed between the end 14 of the first rod section 14 and within the first end member 22a (as shown in
Adapter 28 is preferably made of plastic and is therefore an inexpensive part. It has a generally cylindrical shape and is hollow so as to define a recess, having an end cap with an opening (not labeled) shown in
The adapter recess defined by a wall 30 with a plurality of spaced internal protrusions 32. Protrusions 32 are elongated and extend axially.
The wall 30 and protrusions 32 combine to compensate for the difference in the outer diameters of the first and second rod sections such that identical finials can be used.
The assembly of the present invention can be used with a single adapter 28, as described above. In that instance, the inner diameter of recess 26 of the end members 22 is substantially equal to the outer diameter of the second rod section 16 so as to snuggly fit over end 20 of second rod section 16.
However, the assembly can be used with a second adapter 34, if desired. As seen in
Like adapter 28, adapter 34 is hollow with a substantially cylindrical shape. It has a wall 36 defining a recess with an effective inner diameter substantially equal to the outer diameter of second rod section 16. Preferably, adapters 28 and 34 are substantially identical, except for protrusions 32 which compensate for the difference in the outer diameters of the rod sections such that identical end members can be used on both ends of the rod.
It will now be appreciated that the present invention relates to a tension rod assembly which includes first and second substantially cylindrical rod sections. The first rod section has an end and an outer diameter. The second rod section is hollow and has an inner diameter larger than the outer diameter of the first rod section such that the first rod section may be telescopically received within the second section. The second rod section has an end and an outer diameter. The outer diameter of the second rod section is larger than the outer diameter of the first rod section. First and second end members are provided. Each of the first and second end members has a cylindrical recess with substantially the same inner diameter. The first end member is adapted to be received on the end of the first rod section. The second end member is adapted to be received on the end of the second rod section. An adapter is interposed between the end of the first rod section and the first end member. The adapter constitutes a means for compensating for the difference in the outer diameters of the first and second rod sections such that identical end members can be used on both ends of the tension rod.
While only a single preferred embodiment of the present invention has been disclosed for purposes of illustration, it is obvious that many modifications and variations could be made thereto. It is intended to cover all of those modifications and variations which fall within the scope of the present invention, as defined by the following claims.
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